Did US administration officials make (numerous) honest errors in deciding to wage war against Iraq and its alleged "weapons of mass destruction"...?
No.
President Bush claimed "The British government has learned that Saddam Hussein recently sought significant quantities of uranium from Africa." This was supposedly based on a documented purchasing agreement between the governments of Iraq and Niger. The documents made their way to US Executive Branch officials through unorthodox means, bypassing normal security analysis. The documents were forged. Nobody has been prosecuted (why not?) Among those suggested as being ultimately responsible for the forgeries are agents of the USA, Italy or Israel. We may never know who created them.
We are also expected to believe that the US government was misled into going to war by fabricated intelligence supplied by "Curveball" -- an Iraqi former taxi driver and compulsive liar. Is the US government truly run by such a bunch of idiots, who were fooled into war by mysterious documents and a single con artist? Unlikely!